Not impossible, one of their goals for it is to see how many people would want one, so with a 2-4 week promised lead time they might be planning to manufacture them entirely according to the demand.
Iโm still salty that its not available (the normal one) in alot of countries (asian). I had to get mine through a scalper last year. I am not proud of that, and disappointed in myself but I really wanted one.
It's probably due to warranty and lacking of (hardware) valve support office in Asia. Can't sell without warranty and shipping transcontinental can get expensive...
I think the stuff about "experimenting" with limited editions is because they're trying to find ways to make it hard for scalpers to buy them. That's why they've got stuff about having a Steam Account in good standing etc.. Maybe it's actually working!
Indeed not, but that is a good thing. I was pleasantly surprised that I was able to order one two hours after it went live. They did initially show as sold out (actually went back and forth several times), so it is conceivable that Valve identified and cancelled a bunch of bot-generated orders so that actual people are able to get one.
The downside is that I spent more money than I really wanted to spend, but whatever.
I was going to buy one at launch but the ordering system shit the bed and I bought the 512gb instead thinking the limited edition was sold out. Oh well, it was more than I wanted to spend anyway.